Re: Cracked turbo pipe, Help needed.

["Fred Munro" <munrof@isys.ca>]

Hi Phil;

    My '86 5ktq had the same problem. The exhaust header cracked at the
original weld near the O2 sensor connection. I assumed the pipe was somehow
stressed at this point, because the crack would close up as the pipe heated
up until the leak was sealed and the crack was no longer visible.
    If the pipe is in good condition, you should be able to get it welded.
It may crack again if the mounting system is allowing thermal expansion to
stress the pipe. I would recommend TIG or oxy/acetylene welding. Stick
welding the pipe may result in early failure due to residual stresses in the
pipe from the welding process.

HTH

Fred Munro
'91 200q  276k km

----- Original Message -----
From: Dupin family <dupina@crisny.org>
To: <quattro@audifans.com>
Sent: Wednesday, June 30, 1999 12:44 PM
Subject: Cracked turbo pipe, Help needed.


> Looking for 5KTQ ('86) good used turbo exhaust pipe, the one that
> connects the turbo to the cat with the O2 sensor and the wastegate
> connections.  Mine is cracking at the O2 sensor connection.
>     Is this a generic problem?  Should I suspect my engine mounts?  I
> replaced the turbo side mount approx 8k miles ago.
>     Are there any fixes (reweld), preventive measures (reinforcing
> brackets) available?
>
>     All suggestions welcome.
>
>     Thanks in advance,
>
>     Phil Dupin
>
>